[Bugfix] Fix unable to load some models

[DarkLight1337]

This PR fixes more models broken by #10205 and/or #10304.

I have also added tests for check that each model can be initialized using dummy format.

[github-actions]

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[youkaichao]

thanks for the fix!

[DarkLight1337]

After overriding the HF text config with

{
    "num_layers": 1,
    "num_hidden_layers": 1,
    "num_experts": 2,
    "num_experts_per_tok": 2,
    "num_local_experts": 2,
}

I can even load Snowflake/snowflake-arctic-instruct model (originally with 479B parameters) in a single A10.

[DarkLight1337]

The tests pass locally now!